Coal elevator and bucket



(No Model.) 2 Sheets-Sheet 1.

A. L. HITOHOOGK.

GOAL ELEVATOR AND BUGKET.

No. 287,831. Patented'Nov. 6, 1883.

INVENT DH N Pncs. Phmmm' lm Washington. In:

(No Model.) 7 I I 2 Sheets-Sheet 2.

YA. L. HITGHGOGK.

GOAL ELEVATOR AND BUCKET. v No. 287.831.. Patented-Nov, 6, 1883.

I NVEN FUR the boom swung around to the front. 1 3

hereinafter set forth.

In theaccompanying two sheets of draw- UNITED S T S PATENT OFFICE.

ALBERT L. HITGHOOOK, or PAwTUcKEr, RHODE ISLAND.

coA ELEVATOR AND BUCKET.

sencrrrca'rron forming ea of Letters Patent No. 287,831, dated November 6, 1883.

Application filed Juneis, 1883. (N0 model.)

To allwhont it maty concern.- Be it known that I, ALBERT L. HITcHcocK,

a citizen of f the UnitedStates, residing at Pawtucket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Ooal Elevators and Buckets; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to certain improvements in apparatus for hoisting coal, &c.-; and

it consists of a bucket having a spring-actuated catch pivoted to' the bail thereof, in combination with a tripping-weight adapted to release the spring-catch, which isoperated by a series of levers, &c., aswill be more fully ings, Figure 1 represents a-vertical elevation of a common coal-hoist and boom as provided with my improvements. Fig. 2 represents a side view of the tripping-weight. Fig. 3 represents a view similar to Fig. 1, but showing Fig. 4 represents a sectional plan view through line a: a: of Fig. 1, showing the cam and trippinglever. Fig. 5 represents a top view of the tripping-weight. Fig. 6 represents a front View of the bucket and catch. Fig. 7 represents apartial transverse section of the bucket, showing the catch, &c., enlarged.

Again referring-to the drawings, A represents the mast of an ordinary hoist, and provided with the swinging boom B and stay a, ascommon.

' 0 represents astationary trlpping-cam, supported at c. v A

1) represents a tripping-lever, which is fuloted to the b0om,'and having a catch, 9. Said 5o catch is adapted to engage an arm, f, of the lever F, the latter being still further provided with a counter-weight, f and arm f. This lever is also pivoted to the boom at f as shown.

To the arm f are secured two cords, h h, which pass over sheaves s-s, secured at the top of the boom. Thence the cords pass downwardly and are secured to the frame h of the tripping-weight H. Said weight is also providedwith a central opening, through which the hoisting-rope 0 freely passes. Said rope is attached to suitable hoisting mechanism, from whence it (the rope) leads to the snatch-block at the foot of the mast A, thence up to and overthe block 7, and, passing down through the weight H, is finally secured to the bail L of the bucket or tub K, as shown. Said bucket-+which may be of the ordinary form+ is pivoted at Z Z to the bail L. To the side of the bail is pivoted, at m, a trip-lever, M, the upper portion thereof being bent and extending horizontally over and above the bail,'a-s' shown at m. The lower end of said lever vis adapted to engage a slot or recess, 70 formed on-one-side of the bucket. ,(See Figs. 1, 6, and 7.) A spring, k, also secured to the bail, serves to retain the lever M in its normal or locked position. I

t represents a cord, having attached thereto a weight, W. Said cord passes up and over a sheave, t, secured to the side of the building or car, thence over another sheave or pulley, t the latter being attached to the boom, after which the cord leads up to-the weighted lever E, and is secured thereto at e. SaidleverEis pivoted to the boom at 6 and provided with a counter-weight, e. Said lever has also secured thereto at e a cord, 1), which connects the levers E and F together.

It will be perceived that the counter-weight W should be heavy enough to overbalance the tripping-weight H, and also overcome the weight and friction of the levers and connections.

The following is the manner of operating and I using my invention: The boom, with its bucket attached, is assumed to have been swung over the hatchway of avessel, and the bucket filled and also hoisted to the proper height, after which the boom'is swung rearward to the position shown in Fig. 1, and nearly over the hopper or bin X, when, by slightly swinging the boom still farther to the rear, the end (1 of the lever D will be brought into contact with the cam-surface 0 Fig. 4, and, sliding along therewith, lifts the lever to the position shown by dotted lines, which movement at the same time, by means of the rod (1*, withdraws the catch-lever G and disengages the lever F, thereby releasing the tripping-weight H, which latter falls by its gravity, and striking the arm m of the lever M depresses it, as represented by dotted lines, thereby withdrawing the lower end of said lever from the slot or recess is of the bucket, and allows the bucket to tip and empty itself in the usual manner. The boom is now swung forward again, the levers F E being in the position shown by dotted lines. The latter movement takes up the slack of the cord t and slightly draws upon the weight W, and depresses the lower lever, E, until it assumes the position shown in full lines. The lever F also moves simultaneously therewith by means of the connecting-cord 1). The lower arm, f of the lever F slides over and into the catch or notch g of the lever G. The long arm d of the cam or tripping-lever D overbalances the weight of the rod (1* and lever G, thereby rendering said levers F G self-locking when brought together. The tripping-weight H is raised into position by means of the connecting-cords h, which are also secured to the lever F. At this stage of the operation, the boom being now swung into position over the vessels hatch, the bucket is lowered and filled, after which it is hoisted to the proper height by means of the rope 0, when the boom is again swung rearward and the bucket emptied, as before described.

I may dispense with the cords and sheaves h s and attach a weight, H, directly to the lever F by extending an arm therefrom, and accomplish the same result.

My improved bucket-tripping device can be readily adapted for use on inclinedways,where the swinging boom is not used. The bucket is suspended from the bail a little off its center of gravity, as common, so that when the arm 5 Patent, is-- 1. The combination, with a tripping-weight connected with suitable automatic .releasing mechanism, of an elevator-bucket provided with a bail and catch, the latter adapted to be unlocked by means of said weight, substantially as shown and set forth.

2. In a coal-elevator, the tripping-weight H, provided with a central opening adapted to freely receive the bucket-hoisting rope 0, said weight further adapted to be connected with suitable means for automatically releasing and dropping said weight, substantially as shown and set forth.

3. In a coal-elevator, the combination of the levers E F and cords t p h with the trippingweight H and counter-weight V, substantially as shown and described.

4. In a coal-elevator, the combination of the tripping-lever D and rod or connection d with the cam C and catch G, substantially as shown and described. In testimony whereof I have afiixed my signature in presence of two witnesses.

ALBERT L. HITCHCOCK.

\Vitnesses:

GEO. H. REMINGTON, WM. R. DUTEMPLE. 

